Gas-engine valve.



PATENTED MAR. 3

J. I. THOMPSON. GAS ENGINE VALVE. APPLIGATION FILED MAR. 30. 1907.

A TTORNE Y5 o of the valve casing-on a reduced scale.

JAMEsI. THOMPSON, oFcEN'rERvILL IOWA.

Gas-ENGINE vALvE.

To all whom it may concern.

Be it known that I, a citizen of the United States, residing at Cen'terville, in the county-of Appanoose and State of Iowa, have invented a new and use-' ful Gas-Engine Valve, of which the following is a specification.

This invention relates to a valve for an explosion engine and may be applied to engines ofieither the two or four cycle type, in the former type, however, the valve will be used onlyior gas supply. 1

The object of the invention is td provide an explosion engine, especially of the four cycle type, with a simple, accurate and positively acting rotary valve for controlling the entrance of explosive gas to the cylinder and facilitating quick exhaust therefrom of the products of combustion.

The object sought for is accomplished by means of arotary valve of frusto-conical form seated in a valve casing bolted or otherwise secured to an engine cylinder. The valve casing is provided with inlet and exhaust ports which connect at the proper time through a port in the valve, as the latter rotates, with the compression end of the engine cylinder. With this 'main object and others to be considered, the invention consists of the novel construction, combination and arrangement of arts, hereinafter described and definitely claimed. 1

In the accompanying drawing: Figure 1 is a view in elevation of the valve and valve casing as seen from the inner side. Fig. 2 is a longitudinal sectional view of the same on the line 22 of Fig. 1. Fig. 3 is a sectional view 'of a plate and tube by means of which the valve may be applied to engine cylinders of various types. Fig. 4 is an exterior view 5 is a sectional view of a modified form of valve. Fig. 6 is a longitudinal sectional view of the valve showing a means for cooling the same by air currents. Fig. 7 is a sectional view of the valve as arranged for a two cycle engine.

Similar numerals of reference indicate. corresponding parts in all the figures of the drawings.

Bolted to an engine cylinder, indicated by the numeral 1, is a Valve casing '2 provided with a seat for a rotary frusto-conical valve 3, having a valve stem 4 bymeans of which a continuous rotary motion is imparted to Specification of Letters Patent. Application filed March 30, 1907. Serial No. 365.673.

JAMES I. THOMPSON,

Fig.

haft in a manner famil ar to. all persons skilled in the art. 1

When an engine cylinder is primarily made for this valve, 'aseat 5 is cast there with, on which the valve casing 2 is secured by bolts passing through bolt holes 6 in the valve casing and into the cylinder of the engine. 'When the valve is to be applied to a cylinder not especially adapted'to 1t, a plate 7, (see Fig. 3) is employed to which the valve casing 2 is bolted, the plate in turn being at tached to the cylinder by means of a short,

tube 8 screwed thereinto and into the plate 7.

The valve casing 2 is preferably cast in one piece, with an inner oil receptacle 9, an outer oil chamber 10, and a water jacket. 11 to assist in keepin thevalve cool. The valve seat 12 is of rusto-conical sha c with the base towards the cylinder 1. t the frustum end of the valve seat a conical bearing 13 is formed to take the thrust of the valve 3; a similar bearing 14 is ground in the outer end of the valve casing for a coned ring 15,

fitted adjustably on the valve stem 4. Between the conical bearings 13 and 14 is situated the outer oil chamber 10, circular in.

form, in which rotates a Wabble disk 16 'on the valve stem 4 which distributes oil to the coned bearings and to the valve as the valve stem rotates. The lower part of the coned ring 15 enters a pocket 17 on the outer end of the valve seat 2. Any excess oil applied to the bearing 14 by the wabble disk enters the pocket 17 and thence through an orifice 18 into the oil chamber 10. The inner oil receptacle 9 consists 'of a depression in the lower art of the valve casing 2; its inner wall being ormed by the casing seat 5 on the cylinder. 'The' oil receptacle 9 is kept fullso ,that'the valve 3 will run continually in a rammed March s, 1908..

the valve at one-half speed 'of the-engine bath of oil and perfect the lubrication of the inner end of the valve. The oil can be removed when it becomes 'dirty through a hole in the bottom of; the receptacle closed by a plug19.

An inlet port 20 extends radially through the wall of the valve casin on one side and an exhaust port 21 onanot er side at an an ports are approximately elli tlcal in cross section, their long axes exten i lengthwise of the casing, and curved sligh ify in the direction of their length.

The frusto-conical' valve 3 is preferabl made integral with the valve stem 4 and bot 'gle of ninety degrees to the inlet port. These l are hollow for the reception of a cooling' me-i I 7 made through the valve 2 from the axlalcenter ture is a continuationof that of the inlet and outletports. The base of the valve 3 is ap proximately against the seat 5 but contact therewith 1s not necessary as there is no coinmunication around the valve to either. inlet or outlet ports, cylinder, or with the outside '15' of-the cas ng, except through the valve port 22 and a port 23 of equal size leadingthrough the cylinder wall to the explosion chamber. Where the valve stem 4joins the valve 3, a

' conical shoulder 24 is formed on the valve to abut against the bearing 13 in the valve seat and prevent the valve from binding, as the inclination'of said bearing 'and shoulder is I more abru t/than the side of the valve and its seat. t is well understood that the pressure produced by explosion and compression tends to force the valve tightly in its seat, and but for the bearing 13 the possibility of the valve binding is very grea A valve constructed, as above described, will wear fora very long time and never leak, as the pressure is always in a direction to hold the valve closely inits seat, .and its 1 movement is a continuous rotary one. Foreign substances cannot possibly get to the bearlng surfaceof the valve to scratch it,"and

' an looseness can be taken'up by theadjristab e conical rin 15.

The bearing s oulders 24-Inay be dispensed with by cha ing the shape of the valve as indicated in that the angle 0 inclination of the valve with respect to an axial'plane is greaterthan in the first described form,--and that the inner end of the valve is providedwith'a cylindrical portion 25. It. may. also be desirable on some occasions to extend the port 22 in the valve a little in advance of the base which may be done by means of a flange 26, see Fig.

5, f0 thereby an additional bearing.

Instea of cooling the valve with water, air.

cooling may be substituted. One way of doing this is illustrated in shown, altube 27 of less \diameter than the .bore of the valve stem 4 is sup orted axially in said bore with its inner en 28 extended intothe hollow valve 2. The outer end of the tube 27 is funnel sha ed as at 29 and carries at its mouth a num er of fan blades 30 which exhaust hot air from within the valve 2, cold air entering around the tube 27 to 5,=WheI'6 it will benot'ed- Fig. 6. As thereby the tube 8 as heretofore described. The

:valve will thus be out of contact with the cylinder and notsubject to heat either byradiasv tion or convection.

At Fig.7 is shown a form of'valve to be used with a two cycle engine. It is similar in'all respects to the valve 2 except that it has two diametrically placed ports 31 insteadof a single port 22.

The operation of valves of this type is well known to those familiar with explosion engines and a description thereof will not be necessary.

Having thus described the invention what is claimed is 1. Aval've .for explosion enginescomprising a. valve casing having a frusto-conical valve seat therein and a bearing surfaceat ngthe frustum end of said valve seat inclined 'at an angle different from that'of'the'. seat, "and a rotary frusto-conical valve, fitted to said seat and having' a shoulder at the same angle as, and abutting against said bearing surface to take the 'thrust of the valve. 2. A valve for explosion engines comprising" a valve casing having an open"frustoconical valve seat in'one end the frustum end of said seat being innermost and terminating in a bearing surface inclined at a different angle from that of said valve-seat, an inlet port and an exhaust port extending through the casing'from the valve seat, and a rotary fru sto-conica'l valve fitted to said valve seat. having a curved port extending from its base through the side of the valve in position to a tapered shoulder at the smaller. end of the ;valve' inclined at. the same angle as, and abutting against, said inclined bearing surface to take-the thrust of the valve.

3. A valve for explosion engines comprising'a separable casing having a fiat bearing face onto which opens-a frusto-conical valve seat and an oil receptacle below said seat and communicating therewith, an'inlet port and an outlet port passing at an angle to each, other through the side of said casing into the valve seat, and a rotary 'frusto-conical valve fitted in said valve seat with its base towards the explosion chamber and extending intosaid oil receptacle and having a curved port therethrough, one end of said port openin through the base of the valve at its axia' .center' and the other end through the side of said valve in position to register with the tates.

4. A valve for explosion engines comprisn. ing a valve casing having a closed oil chamber formed therein at one end and a frust'o conical valve seat open at its other end, the. smaller inner end of said valve seat next the inlet and exhaust ports whenthe valve ro-.

oil chamber terminating in a tapered bearing surface, an inlet ort and an exhaust ort leading throught e wall of said casing rem the valve seat, a rotary frusto-conical valve fitted to said valve seat provided with an axial stem projecting from its smaller end throughsiad closed oil chamber, a tapered shoulder to bear against said tapered bearing surface, and a curved port continuously open at the base of said valve to the explosion chamber and at its opposite end in position to register as the valve rotates with the inlet and exhaust ports, and an adjustable bearing ring ada ted to be seated in a conical bearing on t e outside of saidcasing.

5. A valve for explosion engines comprising a valve seat having a closed oil chamber formed therein at one end, an open frustoconical valve seat in its other end, and an open oil receptacle in the same end below said valve seat, an inlet port and an exhaust port extending from the valve seat through the wall of the casing, a rotary frusto-conical valve fitted in said valve seat and having an axial stem extending through the closed oil chamber, an adjustable coned bearing ring on said valve stem adapted to seat in a bearing on the outside of said casing, means on said valve stem within said oil chamber for distributing oil to the bearings and to the valve, and a pocket at the outer end of the casing for collecting excess oil from the outer bearing.

6. A valve casing for explosion engines having a fiat face adapted to be bolted to a like face, a frusto-conical valve seat extending inwardly from said face and communicable with the explosion chamber, an oil receptacle opening on said face below the frusto-conical valve seat and connecting with said seat, a closed oil chamber at the outer end, and an inclined thrust bearing surface at the frustum end of said seat the angle of which is different from that of said valve seat,

In testimon that I claim the foregoing as my own, I ave hereto aflixed my signa ture in the presence of two witnesses.

JAMES I. THOMPSON.

Witnesses:

1 H. E. LUTHER,

O. E. LUTHER. 

